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 TM 55-1905-221-14-3
6-27.2. CONNECTING ROD - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION/ITEM
ACTION
REMARKS
ASSEMBLY (Cont)
h. One important function
of the piston pin
retainer is to prevent
the oil, which cools
the underside of the
piston and lubricates
the piston pin bushings,
from reaching the
cylinder walls. Check
the retainers for proper
sealing as follows:
(1)
Place the piston and
connecting rod
assembly upside down
on a bench.
(2)
Pour clean fuel oil
in the piston to a
level above the
piston pin bosses.
(3)
Dry the external
surfaces of the
piston in the
area around the
retainers and
allow the fuel oil
to set for about
fifteen minutes.
(4)
Check for seepage of
fuel oil around the
retainers. If the
fuel oil leaks around
the retainers,
install new retainers.
In extreme cases it
may be necessary to
replace the piston.
6-454
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